Could Someone Please Check my Valve Shim Calculations?
#11
On the tight end of spec would have the valves open the longest = more intake in, more exhaust out. Sounds good to me. Setting them at the loose end means having to adjust less often though.
#12
My bike starts and runs better with the valves on the loose side. Why is that? It was the only change I made and when I rolled it out on a 60º day it fired up w/o choke for the first time ever.
I set the valves to the loosest spec I could get to keep from doing it as often, since I have to check them twice a year due to mileage. Not sure my reasoning is correct. In reality I've only changed shims 6 times - the intakes were first, then 7500 miles later I did both intake and exhaust because I wanted the valves to all be at the same spec. Been good for the past 10,000. We'll see soon enough.
I set the valves to the loosest spec I could get to keep from doing it as often, since I have to check them twice a year due to mileage. Not sure my reasoning is correct. In reality I've only changed shims 6 times - the intakes were first, then 7500 miles later I did both intake and exhaust because I wanted the valves to all be at the same spec. Been good for the past 10,000. We'll see soon enough.
#13
I just set them loose in order to buy more time. I never really thought about performance gains, and I didn't realize that it could make a difference depending on where you are within the specified range.
#14
In theory it does. In practice, it doesn't.
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kpwestmo
KLX 250S
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08-26-2009 03:18 AM